Houseboat deck



FIG. 1 is a front perspective view of a houseboat deck showing my new design;

FIG. 2 is a top plan view thereof;

FIG. 3 is a right hand side plan view thereof, the left hand side being substantially a mirror image thereof;

FIG. 4 is a rear plan view thereof; and

FIG. 5 is a front plan view thereof. 

The ornamental design for a houseboat deck, as shown and described. 